Wis. Stat. § 139.80: Refunds, credits.

If tobacco products or vapor products upon which the tax has been reported and paid are shipped or transported by the distributor to consumers to be consumed outside the state or to retailers or subjobbers outside the state to be sold by those retailers or subjobbers outside the state or are returned to the manufacturer by the distributor or destroyed by the distributor, the tax may be refunded or credited to the distributor, as prescribed by the department. Any overpayment of the tax imposed under s. 139.78 may be refunded or credited to the taxpayer, as prescribed by the department.